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♦The length of cut per electrode represents cuts with and without power. The higher number is cutting power on.

Table 2-14

Oxygen Regulator Settings for Ultrathermic Electrodes

Saw and wedge cutting may be necessary. Alternatively, maximum cutting efficiency may be achieved by burning a series of holes through the piece prior to cutting across it.

When cutting concrete and rock, a 3/8-inch rod should be used, remembering that it is necessary to ignite the rod on a striker plate. The rod tip must be pressed into the material to create a molten pool. As the material is melted, the tip pressure is periodically released slightly to allow the oxygen to blow the molten material away.

2.4.2 Underwater Welding

Underwater welding is not covered here in detail except for a few brief comments.

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